If you do all the tutorials that are available out there, then eventually you'll have gone over lsdj "as a whole". With any type of music, you pick up bits and pieces here and there. Nobody, no single resource is ever going to give the WHOLE picture of anything. There will always be something that is missed that you'll have to discover through alternate means. Everybody has to go through that process. There are no shortcuts.
You should, instead of trying to learn lsdj specifically, study up on sound design principles in general, and then apply that to LSDJ, so instead of trying to figure out how to come up with a good sound, you'll be trying to figure out how to make the good sound that you've already come up with in your head on LSDJ.
That way you are still learning things that will be beneficial to your usage of LSDJ, but you won't have the frustration of being totally lost in a see of numbers and letters.
Or try something new like HivelyTracker, Klystracker, Deflemask, OpenMPT, Renoise, Sound Club, Muse score, FLStudio, 1Tracker, Protracker, whatever. I highly recommend Beepola if you just want to make music without having to fiddle around with sound design and stuff. ^_^